Water varnish having an enamel surface and insoluble after drying



Patented Sept. 21,1937

UNITED STATES WATER VARNISH HAVING AN ENAMEL SUE- FACE AND INSOLUBLE AFTER. DRYING Fernand Frederic Schwartz, Paris, France, as-

signor to Cela Holding, S.

A Luxemburg,

Luxemburg, a corporation.

No Drawing.

Application August 31, 1935, Se-

rial No. 38,849. In France April 28, 1933 3 Claims.

This invention relates to a water varnish which, after drying; has a transparent enamel surface of very pronounced crystalline brilliancy' and which isinsoluble.

The present application is a continuation-inpart of my application Ser. No. 716,005, flied March 16, 1934. 1

Up to the time of the present invention, brilliant and insoluble varnishes, such as are suitable for automobile bodies, airplanes and the like, have been of the nitrocellulose or oil varnish types. A water varnish which, after drying, had

a brilliant surface and was insoluble had not been known prior to my invention, so far as I am 15, aware. I

I have discovered that a water varnish which,

after drying, has a brilliant surface and is insoluble, maybe made by mixing in an aqueous ammoniacal solution a resinous material, a higher :0 fatty acid which may or may not have been previously saponified, a metallic compound which forms a metallic complex with ammonia and forms a metallic resin soap, and an organic material which is non-fusible in the dry state, is soluble in ammoniacal solutions, has low electrolytic dissociation and has the property of reacting upon the metallic resinsoap to leave, upon drying, an organo-metallic complex which is insoluble in water. Among the resinous materials Such metals are zinc, nickel, cobalt, antimony,

cadmium and tin. All of these metals have the property of forming with ammonia a metallic complex of the general formula."

Bivalent metal. (NH3)4. Bivalent acid radical. An example of such general formula is zinc ammonium carbonate (Zn.(NHa)4.COa).

such as zinc, copper, nickel, cobalt may be employed to give a compound having the formula: bivalent metal. (NH-04. Bivalent acid radical.

. The bivalent metal may be replaced by a metal 55 of higher valence provided that the relative ratio 00 which I may employ are white resin, Manila co- I may use any of the higher fatty acids- It is to be understood that any bivalent metal are cited:

El'rample I A resin, such, for example, as sandarac resin, is pulverized and then treated in a mixer provided with a heating system with a solution of ammo- 2O niacal soap and. water. The ammoniacal soap employed may be the ricinoleate, linoleate or margarate of ammonia. The ammoniacal soap reacts with the resin to produce a resin soap. To the resin soap thus produced is added an ammoniacal metallic complex. Such complex may be formed by dissolving the metallic hydroxide or carbonate of one of the previously mentioned metals in ammonia. The addition of the metallic complex results in the formation of a metallic resin soap. Tnere is then added to the metallic resin soap a solution of albumen (for example, di-fibrated serum), or casein or ceilulose or methyl-cellulose. The cellulose may be employed in the form of Schweitzer liquor.- 5

The product thus obtained is perfectly stable.

It may be diluted with water without forming any precipitate. Upon drying, the loss of water and ammonia causes the metal to combine with the resin and fatty acid, forming a metallic resin soap. 40 Likewise, upon drying, the organic material, such, for example, as casein, reacts upon the metallic resin soap to leave an organo-metallic complex which is insoluble in water, is transparent and brilliant. The film of varnish becomes very hard and adheres perfectly upon a surface to which it is applied. v

' Example II soap obtained by mixing 80 kg. water, 10 kg. ammonia and 3 kg. ricinoleic acid.

(c) Zinc carbonate is prepared by adding 6 kg. of sodium carbonate to a solution of 15 kg. of zinc sulphate in water. The precipitated zinc carbonate is then filtered, washed and dissolved in 30 kg. or ammonia in the presence of 10 kg. ricinoleic acid 'to form an ammoniacal zinc complex.

The final product is obtained by intimately mixing together:

40 kg. casein solution (a),

70kg. resin soap solution (1)) kg. ammoniacal zinc complex (0).

The invention may be carried out by other methods than those particularly described. The varnish may be made in various ways so long as there is mixed together in aqueous ammoniacal solution a resinous material, a higher fatty acid,

a metallic compound which forms a metallic complex with ammonia. and forms a metallic resin soap, and an organic material which reacts upon the metallic resin soap upon drying of the varnish to leave an organo-metallic complex which is insoluble in water.

The use of cellulose and methyl-cellulose as organic materials having the properties above described is not claimed specifically in this application, although their use is covered by the broader claims. They are claimed specifically in a separate application.

- Although I have given two examples of the manner in which the invention may be practiced, it is to be understood that the invention may be otherwise embodied or practiced within the scope of the following claims. 1

What I claim is:

l. A varnish comprising the reaction product of an ammoniacal aqueoussolution containing a resinous material of the group consisting of white resin, Manilla copal, sandarac resin and gum lac, a higher fatty acid of the group consisting of ricinoleic acid, linoleic acid and margaric acid, a compound of a metal of the group consisting of zinc, nickel, cobalt, antimony, cadmium and tin, which forms a metallic complex with ammonia and forms a metallic resin soap, and a material of the class consisting of albumen and casein, which reacts upon the metallic resin soap to leave upon drying an organo-metallic complex which is insoluble in water.

2. The process of making a varnish, which comprises mixing in an aqueous ammoniacal solution a resinous material of the group consisting of white resin, Manilla copal, sandarac resin and gum lac, a higher fatty acid of the group consisting of ricinoleic acid, linoleic acid and margaric acid, a compound oi. a metal of the group consisting o1 zinc, nickel, cobalt, antimony, cadmium and tin, which forms a metallic complex with ammonia and" forms a metallic resin soap, and a material of the class consisting of albumen and casein, which reacts upon the metallic resin soap to leave upon drying an organo-metallic complex which is insoluble in water.

3. A varnish comprising an aqueous ammoniacal solution containing casein, ricinoleic acid, sandarac resin and zinc carbonate.

FERNAND FREDERIC SCHWARTZ. 

